Regarding the Refactoring, which of the following statement is incorrect?

Regarding the Refactoring, which of the following statement is incorrect?
A . RAID 0, 1, 3, 5, 6 and 10 support Refactoring
B . Refactoring does not necessarily require a hot spare disk
C . Refactoring affects RAID performance
D . Refactoring will not interrupt the RAID business

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Answer: A